Most of the time our login page works fine, but occasionally we get a 404 when the user tries to load the login page. This happens even when the router is barely loaded, like 1% of CPU. I don't know how often it happens, but it happens often enough that I see it while testing. After a few page refreshes in the browser, the login page loads normally. Two questions:
1. Why does this happen, and how do I fix it?
2. Is there any logging that will help me to track how often this happens?